4: Hogging page - Cyrille-de-Brebisson/CBScope GitHub Wiki

The hogging page is there to help you during the initial mirror grinding phase. The phase were you dig the sphere in your mirror. The sphere radius is here called ROC for Radius Of Curvature.

On the top, you can specify your home made spherometer parameters. Assuming that you have made a home made spherometer with 3 legs and a micrometer (in mm), calculate the average distance between the legs and enter them on the top. This will we be used to translate micrometer readings into radius when you enter text in the “end ROC spherometer” area. Once again, click on “add measure” to add a new item in the list and “Delete” to delete an idem.

The aim of this page is to let you follow your progress while hogging the sphere. During the hogging process, each time you stop to do a reading, enter the time it took, the reading and the grit used. Type the spherometer reading in the “end ROC spherometer” area and the end ROC will be automatically calculated (ROC= h/2+L²/(6*h) where h is the reading and L the average distance between the legs). If you do NOT have a spherometer, measure your ROC using some other means and enter it in the end ROC field.

One again, the system will automatically calculate a bunch of stuff for you. The amount of material hogged per unit of time (hog/time), and the end sagita. It will also calculate (at the bottom) an estimation of the amount of time left hogging if using the last “grit” (it does it by averaging the hog/time of all the hogging work using that same grit). It gives you a “done %” and tells you how much there is to hog total, and how much is left to hog.

Spherometer: